Loom picker-staff check



UNITED STATES PATENT OFFICE.

ALBERT HALLOWELL, OF LOWELL, MASSACHUSETTS.

LOOM PICKER-STAFF CHECK.

SPECIFICATION forming part of Letters Patent No. 288,631, dated November 20, 1883.

Application med December 1a, lass. (No model) .To a/ZZ whom t may concern:

Beit known that I, ALBERT HALLOWELL, of Lowell, in the county of Middlesex, of the Commonwealth of Massachusetts, have invented a new and useful Improvement in Loom Picker-Staff Checks; and I do hereby declare 'the same to be described in the following specification and represented in the accompanying drawings, of which- Figure 1 is aperspective view of a check Vof f my improved kind. Fig.` 2 is a transverse section of it. Fig. 3 is a side view, and Fig. 4 a front end view, of the body of the springcase. Fig. 5 is an end view of the cap or cover of the said case. Fig. 6 is aperspective view of the spiral spring with its hook and bent arm. Fig. 7 is a perspective view of a volute spring with its hook and bent arm, such being a substitute for a spiral spring with its hook and bent arm. Fig. 8 is a perspective .view showing the check in position on a section, L, of a loom-lay.

The nature of my invention is defined in the claims hereinafter presented.

The picker-staff check, as herein described, is to `have its case fastened to the race-beam of the loom-lay, as shown in Fig. 8, and in a convenient position thereon for a picker-staff, while receding under an impingement of a shuttle, to bring up against the arm of the check and be gradually stopped thereby.

The case of the check is shown as composed of a circular box, the body of which is represented at A and its cover or cap at B. Concentrically within the body is a tubular springsupporter, a, which projects from the bottom of the body, and has two notches, b and c, formed in it at its upper inner edge. Encompassing this supporter is a spiral spring, C, having at its inner end a hook, d, and projecting from its outer end an arm, e, bent as shown, the Whole being in one piece of wire. Instead of a spiral spring, I sometimes use a volute spring, as shown at C in Fig. 7 in which case the notched spring-supporter can be made much shorter than it can when a spiral spring is used. When the spring is in place about the supporter, the hook of the spring is within one of the two notches, they being convenient for setting theV spring and its bent arm for use with either of the picker-staffs of a loom-lay. i

The cover of the case has a projection, g, to enter a notch, h, in the body, such being for the purpose of preventing the cover from slipping around on the body, and to keep along notch, 1I, in the cover in its proper position relatively to a notch, k, in the body, these notches forming what I term the mouth of the cover. The said notches i' and k are arranged so as to enable the arm of the spring to play freely back and forth within them without material, if any, contact with the case, for if, when in movement, such arm rubs against the case or strikes against either end of the mouth composed of such notches, such arm is liable to be broken or injured or detached from the spring.

The case, at its bottom, is provided with a series of conical or pyramidal spurs or projections, Z, to enter the race-beam, when the case is crowded against it, by a confiningscrew going axially through the body and cover of the case, the said cover being perforated at its middle to receive such a screw.

Just before the completion of each backward throw of the picker-staff, such staff brings up against the portion e of the spring-arm, and by such arm and spring becomes gradually arrested, as the spring may become contracted under the force of the blow of the staff induced by the shuttle on being driven against the shaft.

A picker-staff check constructed as set forth has in practice been found to be very ing the cover from turning on the body, as set forth.

2. The check-case consisting of the body A and cover or cap'B, and having within it the notched tubular spring-supporter, and provided with the mouth arranged in the body and cover, and with means (via, the projection g and notch h) of preventing the cover from turning on the body, as set forth.

3. The checkcase consisting'of the bodyA and cover or cap B, and provided' with the tubular spring-supporter and the mouth, and with the spurs projecting from the body, all being substantially as set forth.

Witnesses: ,ALBERT HALLOWELL.

B. H. EDDY, E. B. PRATT.

IOC 

